代码示例:(标识:eg_js_jquery_show)
<!DOCTYPE html>
<html>
<head>
<script src="/jquery/jquery.min.js"></script>
</head>
<body>

<h1>显示 HTML 元素</h1>

<h2 id="01" style="display:none">Hello World!</h2>
<h2 id="02" style="display:none">Hello China!</h2>
<h2 id="03" style="display:none">Hello Shanghai!</h2>

<script>
$(document).ready(function() {
  var myElement = $("#02");
  myElement.show();
});
</script>

</body>
</html>
运行结果: